One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,4)(5,9)(6,7)(8,11)(10,12)(13,14)(15,16)(17,18,22,20)(19,23,25,26)(21,24,30,28)(27,31,29,32)(33,34,40,44)(35,45,47,41)(36,38,37,42)(39,43,46,48)(2,7)(4,8)(9,14)(12,15)(17,19)(18,23)(20,26)(21,29)(22,25)(24,32)(27,30)(28,31)(33,35)(34,41)(36,43)(37,48)(38,39)(40,47)(42,46)(44,45) involution — undirected(5,13)(9,14)(10,16)(12,15)(19,25)(23,26)(27,29)(31,32)(33,36,40,37)(34,42,44,38)(35,43,47,48)(39,41,46,45)(1,3)(2,8)(4,7)(5,10)(6,11)(9,15)(12,14)(13,16)(17,20,22,18)(19,26,25,23)(21,28,30,24)(27,32,29,31)(33,37,40,36)(34,38,44,42)(35,43,47,48)(39,41,46,45)(1,4,6,8)(2,3,7,11)(5,12,13,15)(9,10,14,16)(17,21)(18,24)(19,27)(20,28)(22,30)(23,31)(25,29)(26,32)(33,38)(34,36)(35,46)(37,44)(39,47)(40,42)(41,48)(43,45)(1,5,6,13)(2,9,7,14)(3,10,11,16)(4,12,8,15)(17,19)(18,23)(20,26)(21,27)(22,25)(24,31)(28,32)(29,30)(33,39,40,46)(34,43,44,48)(35,38,47,42)(36,45,37,41)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.